The term sigma comes from internet meme culture, where it describes a lone, self-assured character who follows his own rules, and editors quickly paired that attitude with heavy bass music. Short bass clips like this one became a shorthand for that mood in short-form edits, especially in videos built around slow walks, suits, gym clips and intense stares. Because the sound needs no words, it travels easily between edits and formats, and creators keep returning to it whenever they want an instant, recognisable signal of confidence and control.